CVE-2018-5734 A malformed request can trigger an assertion failure in badcache.c
A malformed request can cause an assertion failure in BIND if the SERVFAIL cache feature is enabled, leading to a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-5734?
CVE-2018-5734 is a high-severity denial of service vulnerability in Isc Bind, published on 16 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
While handling a particular type of malformed packet BIND erroneously selects a SERVFAIL rcode instead of a FORMERR rcode. If the receiving view has the SERVFAIL cache feature enabled, this can trigger an assertion failure in badcache.c when the request doesn't contain all of the expected information. Affects BIND 9.10.5-S1 to 9.10.5-S4, 9.10.6-S1, 9.10.6-S2.
Weakness: CWE-617
Which versions are affected by CVE-2018-5734?
It affects 3 products.
Products include Isc Bind, Netapp Data Ontap Edge, Netapp Solidfire Element Os Management Node.
How do I fix CVE-2018-5734?
No fix has been published for CVE-2018-5734 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-5734 being exploited?
There is no known exploitation of CVE-2018-5734 in the wild and no public exploit code.
Other vulnerabilities in Isc Bind
Sources
Also known as GHSA-g395-wpqc-cmpv.